Speaking of the discussion of demons and
@Shyft's post of mysterious murderers, if
@EarthScorpion is still doing first circle demons, here's an idea.
A special ops demon. Demon SEAL Team Six. Not as good as blood apes at fightan, but still superhumanly good, and also very good at stealth and small-unit ops, although they're not great at large-scale army stuff.
Need to be constantly monitored if you don't want them going around and committing war crimes on anyone you designate as an enemy. They tend to do that. And they tend to take the initiative. Keep them monitored and chaperoned or else you might find that they were shadowing your meeting with a recalcitrant king of a small kingdom and now their intestines are decorating the top of the castle and they're currently torturing some random servants to death for information they don't have?
Literally demon SEAL Team Six, in other words.
Obviously they take the appearance of mouthless humanoids with jet-black skin and three green, glass eyes.
Ten-Bura, The Barbarous Agents
Demons of The First Circle
Progeny of the VItrolic Dragon
A guardsman patrols the walls of a seaborne redoubt, unaware of the creature stalking him, he hears nothing but the crashing of the waves and the howl of the wind. All is well, save for a slight feeling dampness on his skin that has nothing to do with the weather, up until the moment he presents his back to the ocean, a sleek black-grey figure pulls him down over the wall and there is only the sound of steel meeting flesh and then there is nothing but the wind and waves.
That is the trade of the Ten-Bura. They are commandos and special forces agents without peer; they slink through fortresses and cities with nary a sound, assassinating officers, poisoning wells and food supplies, as well as opening gates for an invading force, and acting as scouts and skirmishers for larger armies.
The Tenbura are tall, gangly figures, with a dark grey pelt with a texture and patterning that reminds one of seals and flippered feet and webbed hands, with hound like faces that are featureless save for their three glowing green eyes and a kraken's beak. They were leather harnesses across their chests that are filled with the tools of their craft; daggers and throwing knives, lock-picks and smoke bombs. Their emerald eyes allow them to see in darkest of nights and if they cup their breath into their hand or breath it into a man's face, they can cause a fully grown man to faint.
As a breed, they are very loyal to their masters, often requireing all but the gentlest of binds. This loyalty has its own issues however; they are exceptionally paranoid about the welfare of their commander and her holdings. Often they will take the slightest hint of dissatisfaction as treachery, and seek to remedy such matters on their own; a servant who complained about the dirt of the sorcerous keep will be tortured for information they do not have and then found hung from the rafters the next day, a mortal king who was truculent during negotiations will be found slaughtered in their beds, while a rebellious teenage son will be beaten to an inch of their life.
Uses: The Ten-Bura are breed for wetwork; they are excellent killers, though not as good as dedicated combat breeds such as Blood-Apes or Cloud Arsenals,and they are supernaturally stealthy, able to slip most sentries with ease to commit assassinations, sabotage or terror tactics upon a fortress city to make its subsequent conquest easier.
Often demonologists summon them in small teams of about six or seven as the stiletto to the hammer of that is the Blood-Ape. They can serve as Skirmishers or infiltraitors for a larger force, though they tend to perform poorly in battles as they lack the proper equipment and abilities for it, and then there is their aforementioned skill as operatives. They can escape from Malfeas when lowly soldiers plot rebellion against their master near large bodies of water during a storm. They gain limit whenever they are denied the chance to investigate a threat, real or imagined, to their master.